Galvanic battery.



No. 628,!l6. Patented July 4, I899."

J. van man POPPENBUBG.

GALVANIC BATTERY.

(Application filed Nov. 7, 1898.)

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J OHANNES VON DER POPPENBURG, OF CHARLOTTENBURG, GERMANY.

GALVANIC BATTERY.

' SPECIFICATION forming part of Letters Patent No. 628,116, dated July 4, 1899. Application filed November 7,1898. Serial No. 695,735. (No model.)

ToaZZ whom it may concern.

Be it known that'I, JOHANNES VON DER POPPENBURG, a subject of the German Emperor, residing at Charlottenburg, near Berlin, in the German Empire, have invented certain new and useful Improvements in Galvanic Batteries, of which the following-is a specification.

This invention relates to improvements in primary galvanic batteries, and has foritsv object improvements in the construction of the same, more especially for the purpose of producing a battery of increased efficiency.

In the accompanying drawing Ilhave shown a vertical section of a practical form of galvanic cell (element) constructed my invention.

My improved battery possesses the following characteristic features: A high voltage relatively to the size of the battery, produces a strong current, occupies a proportionately small space, and is capable of being transported and kept for a long time when dry and of being rendered fit for use immediately by the addition of water.

The lower portion of the outer vessel a of the battery is filled with a layer d of a sulfate that does not readily dissolve-as, for instance, calcium sulfate or gypsum, OaSOj, or its equivalent. The layer of gypsum, together with the porous partition, serves to hold the electrodes in their relative position'and prevent the same from swaying to and fro in handling, thereby greatly lessening the danger of breakage, the outer vessel being in practice made of glass. Upon this bottom layer dis placed a carbon electrode b, havingthe form of a cup or open-ended hollow cylinder, which electrode is filled with any suitable depolarizing substance c, as potassium sulfate or bisulfate and manganese dioxid, the lower end of the electrode being closed by means of a suitable insulating-plug f of asphalt or the like. The latter therefore separates the depolarizing agent contained within the carbon electrode from the bottom layer at of sulfate, the annular base of the carbon electrode being, however, in direct or close contact with said layer, as indicated in the drawings.

according to carbon electrode 1) and the battery vessel 0., f

and upon it rests the metallic electrode g, of zinc or other suitable metal, which is provided with the usual contact or conducting strip g, and b is the contact for the carbon electrode. 9

The space above the felt partition 6 is filled with a suitable exciting agent-as chlorid of ammonium, sodium chlorate, or the likewhen the vessel a is closed fluid-tight by a cover h, coated on its under side with a suitable cement, as asphalt paste or the like, and cemented by means of the said cement to the vessel a. In the cover It is fixed a small tube 0, through which water is introduced for putting the battery into operation.

, Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

A battery comprising a vessel, a cover sealed, thereto, a chambered carbon electrode in said vessel, projecting fluid-tight through the cover thereof, a depolarizing agent in the chamber of said electrode, an insulating-plug closing the lower end of said chamber, a me-' JOHANNES VON DER POPPENBURG.

Witnesses: I

MAX LEMcKE, E. H. L, MUMMENHOFF. 

